碳基纖維合成材料是趨勢，即使不考慮稀土。AI說B-21用了大量的碳基纖維合成材料。

來源: 大觀園的賈探春於 2025-10-17 21:29:16 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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